/*
 * Created by Chris Wanstrath, with modifications by Cheah Chu Yeow.
 *
 * Facebox (for jQuery)
 * version: 1.2 (05/05/2008)
 * @requires jQuery v1.2 or later
 *
 * Examples at http://famspam.com/facebox/
 *
 * Licensed under the MIT:
 *   http://www.opensource.org/licenses/mit-license.php
 *
 * Copyright 2007, 2008 Chris Wanstrath [ chris@ozmm.org ]
 *
 * Usage:
 *  
 *  jQuery(document).ready(function() {
 *    jQuery('a[rel*=facebox]').facebox() 
 *  })
 *
 *  <a href="#terms" rel="facebox">Terms</a>
 *    Loads the #terms div in the box
 *
 *  <a href="terms.html" rel="facebox">Terms</a>
 *    Loads the terms.html page in the box
 *
 *  <a href="terms.png" rel="facebox">Terms</a>
 *    Loads the terms.png image in the box
 *
 *
 *  You can also use it programmatically:
 * 
 *    jQuery.facebox('some html')
 *    jQuery.facebox('some html', 'my-groovy-style')
 *
 *  The above will open a facebox with "some html" as the content.
 *    
 *    jQuery.facebox(function($) { 
 *      $.get('blah.html', function(data) { $.facebox(data) })
 *    })
 *
 *  The above will show a loading screen before the passed function is called,
 *  allowing for a better ajaxy experience.
 *
 *  The facebox function can also display an ajax page, an image, or the contents of a div:
 *  
 *    jQuery.facebox({ ajax: 'remote.html' })
 *    jQuery.facebox({ ajax: 'remote.html' }, 'my-groovy-style')
 *    jQuery.facebox({ image: 'stairs.jpg' })
 *    jQuery.facebox({ image: 'stairs.jpg' }, 'my-groovy-style')
 *    jQuery.facebox({ div: '#box' })
 *    jQuery.facebox({ div: '#box' }, 'my-groovy-style')
 *
 *  Want to close the facebox?  Trigger the 'close.facebox' document event:
 *
 *    jQuery(document).trigger('close.facebox')
 *
 *  Facebox also has a bunch of other hooks:
 *
 *    loading.facebox
 *    beforeReveal.facebox
 *    reveal.facebox (aliased as 'afterReveal.facebox')
 *    init.facebox
 *
 *  Simply bind a function to any of these hooks:
 *
 *   $(document).bind('reveal.facebox', function() { ...stuff to do after the facebox and contents are revealed... })
 *
 */
(function($) {
  $.facebox = function(data, klass) {
    $.facebox.loading();

    if (data.ajax) fillFaceboxFromAjax(data.ajax);
    else if (data.image) fillFaceboxFromImage(data.image);
    else if (data.div) fillFaceboxFromHref(data.div);
    else if ($.isFunction(data)) data.call($);
    else $.facebox.reveal(data, klass);
  };

  /*
   * Public, $.facebox methods
   */

  $.extend($.facebox, {
    settings: {
      opacity      : 0, // Set from 0 (invisible) to 1 (fully opaque).
      overlay      : true,
      loadingImage : '/home/static/facebox/loading.gif',
      closeImage   : '/home/static/facebox/closelabel.gif',
      position     : { top: null, left: null },  // In px, if set. E.g. { top: 20 }.
      imageTypes   : [ 'png', 'jpg', 'jpeg', 'gif' ],
      faceboxHtml  : '\
    <div id="facebox" style="display:none;"> \
      <div class="popup"> \
        <table> \
          <tbody> \
            <tr> \
              <td class="tl"/><td class="b"/><td class="tr"/> \
            </tr> \
            <tr> \
              <td class="b"/> \
              <td class="body"> \
                <div class="content"> \
                </div> \
                <div class="footer"> \
                  <a href="#" class="close"> \
                    <img src="/home/static/facebox/closelabel.gif" title="close" class="close_image" /> \
                  </a> \
                </div> \
              </td> \
              <td class="b"/> \
            </tr> \
            <tr> \
              <td class="bl"/><td class="b"/><td class="br"/> \
            </tr> \
          </tbody> \
        </table> \
      </div> \
    </div>'
    },

    loading: function() {
      init();
      if ($('#facebox .loading').length == 1) return true;
      showOverlay();

      $('#facebox .content').empty();
      $('#facebox .body').children().hide().end().
        append('<div class="loading"><img src="'+$.facebox.settings.loadingImage+'"/></div>');

      var css = {};
      var pageScroll = getPageScroll();
      if ($.facebox.settings.position.top) {
        css.top = pageScroll[1] + $.facebox.settings.position.top;
      } else {
        css.top = pageScroll[1] + (getPageHeight() / 10);
      }
      if ($.facebox.settings.position.left) {
        css.left = pageScroll[0] + $.facebox.settings.position.left;
      } else {
        $('#facebox').show();
        css.left = pageScroll[0] + $(window).width() / 2 - ($('#facebox table').width() / 2);
      }

      $('#facebox').css(css).show();

      $(document).bind('keydown.facebox', function(e) {
        if (e.keyCode == 27) $.facebox.close();
        return true;
      });
      $(document).trigger('loading.facebox');
    },

    reveal: function(data, klass) {
      $(document).trigger('beforeReveal.facebox');
      if (klass) $('#facebox .content').addClass(klass);
      $('#facebox .content').append(data);
      $('#facebox .loading').remove();
      $('#facebox .body').children().fadeIn('normal');
      if ($.facebox.settings.position.left) {
      } else {
        $('#facebox').css('left', $(window).width() / 2 - ($('#facebox table').width() / 2));
      }
      $(document).trigger('reveal.facebox').trigger('afterReveal.facebox');
    },

    close: function() {
      $(document).trigger('close.facebox');
      return false;
    }
  });

  /*
   * Public, $.fn methods
   */

  $.fn.facebox = function(settings) {
    init(settings);

    function clickHandler() {
      $.facebox.loading(true);

      // support for rel="facebox.inline_popup" syntax, to add a class
      // also supports deprecated "facebox[.inline_popup]" syntax
      var klass = this.rel.match(/facebox\[?\.(\w+)\]?/);
      if (klass) klass = klass[1];

      fillFaceboxFromHref(this.href, klass);
      return false;
    }

    return this.bind('click.facebox', clickHandler);
  };

  /*
   * Private methods
   */

  // called one time to setup facebox on this page
  function init(settings) {
    if ($.facebox.settings.inited) return true;
    else $.facebox.settings.inited = true;

    $(document).trigger('init.facebox');
    makeCompatible();

    var imageTypes = $.facebox.settings.imageTypes.join('|');
    $.facebox.settings.imageTypesRegexp = new RegExp('\.(' + imageTypes + ')$', 'i');

    if (settings) $.extend($.facebox.settings, settings);
    $('body').append($.facebox.settings.faceboxHtml);

    var preload = [ new Image(), new Image() ];
    preload[0].src = $.facebox.settings.closeImage;
    preload[1].src = $.facebox.settings.loadingImage;

    $('#facebox').find('.b:first, .bl, .br, .tl, .tr').each(function() {
      preload.push(new Image());
      preload.slice(-1).src = $(this).css('background-image').replace(/url\((.+)\)/, '$1');
    });

    $('#facebox .close').click($.facebox.close);
    $('#facebox .close_image').attr('src', $.facebox.settings.closeImage);
  }

  // getPageScroll() by quirksmode.com
  function getPageScroll() {
    var xScroll, yScroll;
    if (self.pageYOffset) {
      yScroll = self.pageYOffset;
      xScroll = self.pageXOffset;
    } else if (document.documentElement && document.documentElement.scrollTop) {  // Explorer 6 Strict
      yScroll = document.documentElement.scrollTop;
      xScroll = document.documentElement.scrollLeft;
    } else if (document.body) {  // all other Explorers
      yScroll = document.body.scrollTop;
      xScroll = document.body.scrollLeft;
    }
    return new Array(xScroll,yScroll);
  }

  // Adapted from getPageSize() by quirksmode.com
  function getPageHeight() {
    var windowHeight;
    if (self.innerHeight) {  // all except Explorer
      windowHeight = self.innerHeight;
    } else if (document.documentElement && document.documentElement.clientHeight) {  // Explorer 6 Strict Mode
      windowHeight = document.documentElement.clientHeight;
    } else if (document.body) {  // other Explorers
      windowHeight = document.body.clientHeight;
    }
    return windowHeight;
  }

  // Backwards compatibility
  function makeCompatible() {
    var $s = $.facebox.settings;

    $s.loadingImage = $s.loading_image || $s.loadingImage;
    $s.closeImage = $s.close_image || $s.closeImage;
    $s.imageTypes = $s.image_types || $s.imageTypes;
    $s.faceboxHtml = $s.facebox_html || $s.faceboxHtml;
  }

  // Figures out what you want to display and displays it
  // formats are:
  //     div: #id
  //   image: blah.extension
  //    ajax: anything else
  function fillFaceboxFromHref(href, klass) {
    // div
    if (href.match(/#/)) {
      var url    = window.location.href.split('#')[0];
      var target = href.replace(url,'');
      $.facebox.reveal($(target).show().replaceWith("<div id='facebox_moved'></div>"), klass);

    // image
    } else if (href.match($.facebox.settings.imageTypesRegexp)) {
      fillFaceboxFromImage(href, klass);
    // ajax
    } else {
      fillFaceboxFromAjax(href, klass);
    }
  }

  function fillFaceboxFromImage(href, klass) {
    var image = new Image();
    image.onload = function() {
      $.facebox.reveal('<div class="image"><img src="' + image.src + '" /></div>', klass);
    };
    image.src = href;
  }

  function fillFaceboxFromAjax(href, klass) {
    $.get(href, function(data) { $.facebox.reveal(data, klass); });
  }

  function skipOverlay() {
    return $.facebox.settings.overlay == false || $.facebox.settings.opacity === null;
  }

  function showOverlay() {
    if (skipOverlay()) return;

    if ($('facebox_overlay').length == 0)
      $("body").append('<div id="facebox_overlay" class="facebox_hide"></div>');

    $('#facebox_overlay').hide().addClass("facebox_overlayBG")
      .css('opacity', $.facebox.settings.opacity)
      .click(function() { $(document).trigger('close.facebox'); })
      .fadeIn(200);
    return false;
  }

  function hideOverlay() {
    if (skipOverlay()) return;

    $('#facebox_overlay').fadeOut(200, function(){
      $("#facebox_overlay").removeClass("facebox_overlayBG");
      $("#facebox_overlay").addClass("facebox_hide");
      $("#facebox_overlay").remove();
    });

    return false;
  }

  /*
   * Bindings
   */

  $(document).bind('close.facebox', function() {
    $(document).unbind('keydown.facebox');
    $('#facebox').fadeOut(function() {
      if ($('#facebox_moved').length == 0) $('#facebox .content').removeClass().addClass('content');
      else $('#facebox_moved').replaceWith($('#facebox .content').children().hide());
      hideOverlay();
      $('#facebox .loading').remove();
    });
  });

})(jQuery);
